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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Matthew Owen Duffett, L.AC.

Acupuncturist in Berkeley, CA · enumerated 2023.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1245946185

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Registry record

Entity type Individual (Type 1)
Name Matthew Owen Duffett
Credential L.AC.
Sex Male
Practice address 3280 Adeline St, Berkeley, CA, 94703
Phone (510) 387-8678
Enumeration date Jan 24, 2023
Last updated in NPPES Jan 24, 2023

Taxonomy & licenses

171100000X Acupuncturist Other Service Providers · License 19625 (CA) Primary
LAC · Licensed Acupuncturist: A practitioner licensed to perform acupuncture. About the LAC credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Matthew Duffett?
Matthew Duffett is registered in NPPES with the primary taxonomy of Acupuncturist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-24.